详情

原文传递 Converting GPS Coordinates (phil lambdal h) to Navigation Coordination (ENU)

题名：	Converting GPS Coordinates (phil lambdal h) to Navigation Coordination (ENU)
作者：	Drake, S. P.;
关键词：	GLOBAL POSITIONING SYSTEM, INERTIAL NAVIGATION, CONVERSION, AUSTRALIA, GEOGRAPHICAL INFORMATION SYSTEMS.
摘要：	In many applications relevant to the Australian Defence Force (ADF) it is necessary to convert the Global Positioning System (GPS) coordinates of latitude, longitude and height to a local navigation frame with coordinates, east, north and up. For example when testing navigation instruments, such as the inertial navigation system (INS), it is often helpful to compare these measurements with those obtained from an independent GPS receiver. An INS records the east, north and up displacement from its point of origin. To compare INS and GPS measurements we need to transform GPS coordinates to navigation coordinates. Furthermore, east, north, up coordinates are essential in determining the line of sight for terrain data given as latitude, longitude and height, such as digital terrain elevation data (DTED). For large amounts of data, e.g, trial data, this process may be very computationally intensive. Means for converting GPS data to navigation frame coordinates already exist. Row- ever, the method presented in this report is roughly three times faster than a commonly employed one. The coordinate transformation routine outlined in this report is accurate to within lOm over a range of 60km. The coordinate transformation method outlined here will be used in the Navwar simulation package currently under development in DSTO Edinburgh. It will have the effect of significantly reducing the processing time of line of sight calculations in jamming models.
总页数：	25
报告类型：	科技报告